Motor-cycle side car



May 26, 1925. 1,539,139

,1. A. OCONNQR MOTOR CYCLE SIDE CAR Filed Jan. 28 1924 zmes' fi/ekwlw awn Patented May 26, 1925 Janus nnnxelvnna coomyon, ornssnnnon, natnouann, 'vrc'ronm. AUSTRALIA.

MOTOR-CYCLE 'SIDE CA1}.

Appl cation .filetl January 2 2111 9 eriarNb. 89,086.

T (ZZZ whom it may concern:

Be it known that L Justus .ALEKANDFIE' ,OfGONNOP a subject of the King otG e Britain and Ireland, residing at Paseoe Crescent, North Essendon. 1n the city of ,Essendon, a suburb of the city otltlelbouiine. in the; State of Victoria, Common wealth of Australia, have invented certain. new and useful Improvements in Motor-Cycle Side Cars, of whichthe following is a speeifi'cation.

The object an improvedmotor cycle side car or simple construction. by whichfwearznpon the tires of the motor cycle and side car Wheels is minimized and other advantages are obtained which will become more clearly apparent from the following description to .those skilled in the an. 'Elhe scope of the invention is defined in the appended claims.

Referring to the drawings wherein the manner of carrymgtlie invention int-o practical efiect is shown Figure 1 is a rear perspective view of the invention' Portions have been broken away and the axle of the side car wheel has been omitted ":for convenience of illustration.

' Figure 15 is a perspective view showing the axial mounting of the side car wheel.

Figure 2 is a perspective view of pivotally arranged parts adapted to provide for comparative vertical movement of the side car wheel." V

Figure 3 is side elevationshowing the movement of pivotal parts when-{the side car wheel passes over an obstruction.

Figure 4 is an enlarged sectional plan of a ball joint connection by-which a frame member is attached tothernot'or cycle frame.

Figure 5 is an enlarged sectional end elevation of a ball joint connection by which a lateral bar is attached giQ'g'ulie ,lllQtlor cycle frame.

-Figure 6 is a detailed View, in side elevation', of the pivotal connection for the lower end of the diagonal stay or brace.

Figure 7 is an end view, partlyiin section, of Figure 6. i V The invention includes an approximately diagonal frame member 2 pivotally connected at its forward end to the motor cycle frame 3. The connection is made behind the front wheel of the motor cycle as is usual. The connection preferably comprises a ball 4 having a stem 5. The stem 5 passesthrough the motor cycle frame 3- The ball .commonly used and any suitable ing from the ballelti and 1. the casing 1s a stem 1? connected to the clamp, such as that shown at .18.

:bar '14-v .are two- .clamp or beating ronsiati 1g bolted together Depending .;from this clamp is a lug 25 l termed w dth a aansyerse 0M 5 whic eesa y ha es the lar a re u is located ina casing 6 into .Whichthe forward end offthe member 2 is threaded, as seen in Figure The rear end of the member .2 ;is upraised as vat-'?-..and located parallel with the motor cycle drains. Can

ried by the i'ipraised .end 7 is a bearingS in which is removably disposed the axle .9 of the car wheel'lO. :Removable axles are land may be employed. Carried bylthe member 2.a'd-

i I fiacent to the end '7 is a bearing ll in which of this invention .18 to provide is mounted a'pin 12. TheIinner end ofth'e pin =12 projects beyond the'bearing; .Pivot-' of which is. attached to the outer endofla lateral bar 14-; The innerend ,o'f'the bar 14 has threaded thereon :a casing l 5 1' in which 5. Progesttssing throng-h a .ball 16 is locatedysee Figu motor cycle frameS by any known form .01

Secured ...to the pttranie member 2, :beneath the upraised rear end ward end of a spring v'19 the rear end or .4 thereof, is the .for-

which is secured to the outer end of the V lateral bar 14:. Mounted .upon the lateral elliptical springs .20 united by autie piece-21Yupoii which the .rear end of the/side; car body" 22 is supported. llhev tztorward endot thebody 22 is supported l coiled springs mounted upon inplatzto m 24; carried by the member 2. l

-Mounted jupon the lateral bar 1% is a oitwo pieces as shown in Figs; ;6 ,and 7.

through 1 2.6? o -a ai brace Qrst y s2 ,Siit ne wa her o th l ke m y b located at eachside'ot the lug 25 to prevent undue slackness while permitting a slight movement of the lower end 26": of the stay 26 through the hole 25 in the lug 25 when the lateral bar 14; (and with it the clamp 25) slightly rotates. Any other suitable coupling may be used in lieu of the clamp 25 g Most motor cycles are provided the stem 5 of such a coupling; but should no hole be provided in the motor cycle frame. the coupling may obviously be attached by a clamp such as that indicated at 18 (Fig. 5). It is common practice in side car construction to employ diagonal braces having pivotal connections at the upper or lower ends thereof or at both ends. In the present instance, any possibility of binding of the several parts should be avoided by making provision for movement of the lower end of the brace in relation to the clamp 25 when the bar 14 slightly rotates and also when the bar 14 is slightly deflected by movement of the arm 13.

When the side car wheel 10 rises, the rear end 7 of the frame member 2 also rises and pivots at its forward end at the ball connection 46 by which it is secured near the front of the motor cycle frame 3. The bearing 11 rises with the end 7, thereby lifting the forward end of the arm 13, as shown in broken lines in Figure 3. The arm 13 pivots upon the pin 12, and as it rises it slightly rotates the lateral bar 14. The slight rolling action of the bar 14 reduces the effect of any shocks that may reach the passenger. The spring 19 functions as a shock absorber. This is clearly seen from Figure 3. The arrangement of the several parts is such that the distance between the side car Wheel and the rear wheel of the motor cycle is evenly maintained avoiding spread in the track of the wheels and minimizing wear of the tires. The bar14 is prevented from rising and falling by the diagonal brace 26. Adjustment of the side car in relation to the motor cycle frame may be accurately effected by threading the casings 6 and 15 along the bars 2 and 14 respectively and sliding the clamp 25 along the bar 14.

What I claim is 2- 1. In a motor cycle side car, a frame member pivotally connected at its forward end to the motor cycle frame adjacent to the front wheel of the motor cycle and ere tending to and carrying at its rear end the side car wheel so that said member acts as a long lever when the wheel moves vertically, an arm pivoted to the frame member,

a: lateral bar connected to the arm, a shoci: absorber connected to the frame member, and "the lateral bar, and a side car body resiliently mounted upon the lateral bar.

2. In a motor cycle side car, a frame member forming a long lever, a lateral bar pivotally connected to the frame member, a side car body resiliently supportedby th lateral bar, and a shock absorber disposed between the frame member and the bar, so that, when the shock absorber is operated, a slight rolling motion is communicated to the bar.

8. In a motor cycle side car, a side car wheel capable of rising and falling when passing over road inequalities, a lateral bar capable of slight rotary movement and at taehed at its inner end to the motor cycle frame, a diagonal brace disposed between said bar and the motor cycle frame, a side car body resiliently supported above the bar, a shock absorber operated by vertical movement ofthe side car wheel, and means for causing av slight rolling motion of the bar when the shock absorber is operated.

4. A motor cycle side car comprising a frame member pivotally connected at its forward end at the front of the motor c cle frame, a. side car wheel reinovably mounted at the rear end of the frame member, an arm pivoted to the frame member forward of the wheel aXle, a lateral bar pivotally connected at its inner end to the motor cycle frame and connected at its outer end to the rear end of the arm, a spring attached to the frame member and the lateral bar, and springs carried by the frame member and the lateral bar to supportthe side car body.

Intestimony whereof, I have signed my name to this specification at Melbourne, State of Victoria, Commonwealth of Australia in the presence of two subscribing witnesses.

Dated this 18th day of December A. D. 1923.

JAMES ALEXANDER OOONNOR.

Witnesses:

G. A. UKEN, V. J. CLEARY. 

